.part-1 {
  background: url('../img/banner03.jpg');
}
.part-2 {
  width: 100%;
  background: #f4f4f4;
  align-items: flex-start;
  box-sizing: border-box;
  padding: 80px 100px;
}
.sidebar {
  background: #fff;
  width: 298px;
  height: 460px;
  box-sizing: border-box;
  padding: 30px;
  color: #333333;
  font-size: 14px;
  flex-shrink: 0;
  margin-right: 30px;
  align-items: flex-start;
}
.sidebar img {
  display: none;
}
.sidebar .li {
  width: 100%;
  font-size: 14px;
  justify-content: space-between;
  margin-bottom: 12px;
  cursor: pointer;
}
.sidebar .li.active {
  font-weight: bold;
  font-size: 16px;
}
.sidebar .active img {
  display: inline-block;
}

.panel {
  display: none;
}
.part-2 .panel.active {
  display: block;
}
.items {
  flex-wrap: wrap;
  align-items: flex-start;
}
.item {
  width: 420px;
  margin: 0 36px 36px 0;
}
.item h4 {
  margin: 0;
  padding: 0;
}
.item .top {
  background: #fff;
  width: 420px;
  height: 280px;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  margin-bottom: 1px;
}
.item .bottom {
  background: #fff;
  padding: 30px;
  color: #666666;
  font-size: 14px;
  height: 195px;
}
.item .bottom h4 {
  color: #333333;
  font-size: 24px;
}
@media screen and (max-width: 1366px) {
  .part-2 {
    padding: 80px 40px;
  }
  .item:nth-child(even) {
    margin-right: 0;
  }
}
@media screen and (max-width: 768px) {
  .part-1 {
    background-position: 1100px;
  }
  .item:nth-child(even) {
    margin-right: 0;
  }
  .part-2 {
    padding: 0.36rem 0.16rem;
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    height: 1.2rem;
    padding: 0;
    font-size: 0.28rem;
    flex-direction: row;
    justify-content: space-between;
    background: none;
    box-sizing: content-box;
    padding-bottom: 0.24rem;
    margin: 0;
    z-index: 99;
    background: #f4f4f4;
  }
  .item .top {
    height: auto;
  }
  .sidebar .li {
    height: 100%;
    width: 32%;
    background: #fff;
    justify-content: center;
    font-size: 0.3rem;
    flex-wrap: wrap;
    box-sizing: border-box;
    padding: 0 0.24rem;
  }
  .sidebar .li.active {
    font-size: 0.3rem;
  }
  .sidebar .active img {
    display: none;
  }
  .sidebar .li.active {
    background: #df8d1f;
    color: #fff;
  }
  .panel .items {
    background: #f4f4f4;
  }
  .item {
    width: 100%;
    margin: 0 0 0.36rem 0;
    background: #fff;
  }
  .item .top {
    width: 100%;
  }
  .item .top img {
    width: 100%;
  }
  .item .bottom {
    width: 100%;
    box-sizing: border-box;
    font-size: 0.3rem;
    line-height: 0.44rem;
    height: auto;
  }
  .item .bottom h4 {
    font-size: 0.38rem;
  }
  .ding {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: #f4f4f4;
    padding: 0.16rem 0;
    box-sizing: content-box;
  }
}
